Diabetes is associated with more rapid cognitive declines in older people and an elevated risk of dementia, especially Alzheimer's disease. Diabetes is a metabolic illness where a person has high levels of blood sugar because of lack of insulin production or the cells in the body do not properly respond to insulin. It was found through research that adults that has severe diabetes has increased risk of developing cognitive problems or memory problems. This starts from mild forgetfulness, difficulties in language and other cognitive problems that can be noticed but do not interfere with daily tasks. This stage is still considered as a transition stage between dementia and aging.